Which of the following causes AIDS (acquired immune deficiency syndrome)?

A) A viroid B) A prion C) A bacterium D) An archaea E) A virus


E

Biology & Microbiology

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Groups of organisms that cannot be distinguished morphologically but have no gene flow between them, and are indeed evolutionary independent units, are known as ________ species

Fill in the blank(s) with correct word

Biology & Microbiology

Many dinosaur movies depict huge tree-like plants growing out of swamps. To what group would these "trees" likely belong? Select all correct choices

A. lycophytes B. cycads C. angiosperms D. bryophytes

Biology & Microbiology

Basal transcription in eukaryotes involves the action of only the core promoter

Indicate whether the statement is true or false

Biology & Microbiology

What are behaviors intended to attract a member of the opposite sex for mating?

a. intrasexual selection b. kin selection c. courtship displays d. mate-guarding

Biology & Microbiology